Well, its been built for about 5 minutes and this happened so I think its safe to say its kitty approved! Our 8 week old kittens found their way up the ladder just fine and LOVE the dangling mice. Its easy to put together, I had my 6 and 7 yr old helping me with no problems. Be ready with a vacuum though because a lot of the carpet material sloughs off while building it. Seems sturdy enough and it seems like a nice, tall, fun structure for the price! My only tiny complaint is I would have hoped the carpet material was more carpet-y and not so slick. I feel like theyd get more out of clawing more textured carpet, but at least they have the sisal wrapped poles. For the cost its a great kitty tower!